Fuel Injector Balance Test

Fuel Injector Balance Test






Fuel Injector Balance Test Example (Actual Results May Vary)






Test Description

The numbers below refer to numbers on the diagnostic table.

4. The engine coolant temperature must be below the operating temperature in order to avoid irregular fuel pressure readings due to hot soak fuel boiling.
5. The fuel pressure should be within the specified range. If the fuel pressure is not with the specified range, go to Fuel System Diagnosis.
6. The fuel pressure should reach a steady value. If the fuel pressure does not reach a steady value, refer to Fuel System Diagnosis.
7. If the pressure drop value for each fuel injector is within 20 kPa (3 psi) of the average pressure drop value, the fuel injectors are flowing properly. Calculate the pressure drop value for each fuel injector by subtracting the second pressure reading from the first pressure reading. Refer to the illustration above.

Fuel Injector Balance Test Procedure